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HDM_SETITEM Overview  Group

The HDM_SETITEM message sets the attributes of the specified item in a header control. You can send this message explicitly or by using the Header_SetItem macro.


wParam = (WPARAM) (int) index; 

lParam = (LPARAM) (const HD_ITEM FAR*) phdi; 



Index of the item whose attributes are to be changed.
Pointer to an HD_ITEM structure. When the message is sent, the mask member indicates the attributes to set. The other members specify new attributes.

Return Values

If the operation succeeds, the return value is TRUE.

If the operation fails, the return value is FALSE.


The HDN_ITEMCHANGING notification message is sent to the parent window before the item attributes are changed. The parent window can return FALSE to prevent the changes, and in that case, HDM_SETITEM returns FALSE. If the parent window returns TRUE, the changes are made and the parent window receives the HDN_ITEMCHANGED notification message.

See Also


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